JBC Tools C245756, Cartridge Chisel 4.8 x 1 HTJBC Tools C245756, Cartridge Chisel 4. 8 x 1 HT This high thermal efficient cartridge has a large tinned surface and a screwdriver shape (chisel). It is a thinner version of the C245908 tip. Its 1 mm thickness allows to work with thinner components. C245 cartridge range is the widest one of JBC with many shapes, sizes and special models. They are appropriate for general soldering purposes and they are perfect for both SMD components or for